﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using SuperQuiz.Logic;
using SuperQuiz.Model;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Grouped Items Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234231

namespace SuperQuiz
{
    /// <summary>
    /// A page that displays a grouped collection of items.
    /// </summary>
    public sealed partial class HomePage : SuperQuiz.Common.LayoutAwarePage
    {
        public HomePage()
        {
            this.InitializeComponent();
            QuizApplication.Instance.SetupSettingsEvents(this);
        }

        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="navigationParameter">The parameter value passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
        /// </param>
        /// <param name="pageState">A dictionary of state preserved by this page during an earlier
        /// session.  This will be null the first time a page is visited.</param>
        protected override async void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
        {
            this.DefaultViewModel["Categories"] = QuizApplication.Instance.QuizCategories;
            await QuizApplication.Instance.AwaitLoad();
            if (QuizApplication.Instance.QuizCategories.Count == 1)
            {
                if (QuizApplication.Instance.QuizCategories[0].Quizzes.Count == 1)
                {
                    var quiz = QuizApplication.Instance.QuizCategories[0].Quizzes[0];
                    this.Frame.Navigate(typeof(QuizPage), quiz.UniqueId);
                }
            }
        }

        /// <summary>
        /// Invoked when a group header is clicked.
        /// </summary>
        /// <param name="sender">The Button used as a group header for the selected group.</param>
        /// <param name="e">Event data that describes how the click was initiated.</param>
        void Header_Click(object sender, RoutedEventArgs e)
        {
            var quizCategory = (QuizCategory)((sender as FrameworkElement).DataContext);
            this.Frame.Navigate(typeof(CategoryPage), quizCategory.UniqueId);
        }

        /// <summary>
        /// Invoked when an item within a group is clicked.
        /// </summary>
        /// <param name="sender">The GridView (or ListView when the application is snapped)
        /// displaying the item clicked.</param>
        /// <param name="e">Event data that describes the item clicked.</param>
        void ItemView_ItemClick(object sender, ItemClickEventArgs e)
        {
            var quiz = (Quiz)e.ClickedItem;
            this.Frame.Navigate(typeof(QuizPage), quiz.UniqueId);
        }
    }
}
